Search or add a thesis

Advanced Search (Beta)
Loading...
Loading...
Loading...
Loading...
Loading...
Loading...
Loading...

پروفیسر نورالحسن ہاشمی

پروفسیر نورالحسن ہاشمی
افسوس ہے کہ اردو کے بلند پایہ ادیب و محقق اور لکھنؤ یونیورسٹی کے سابق صدر شعبۂ اردوپروفیسر نورالحسن ہاشمی ۲۸؍ نومبر کو وفات پاگئے، اردو کے علاوہ ان کو ہندی، اودھی، انگریزی اور فارسی زبانوں پر بھی پوری دسترس تھی، اردو کی کئی کلاسیکل کتابیں تحقیق و تدوین کے بعد شائع کیں جن میں نوطرز مرصع، بکٹ کہانی، کلیات ولی اور قدیم روزنامچہ قابل ذکر ہیں، ان کی سب سے اہم علمی، ادبی اور تحقیقی کتاب ’’دلی کا دبستان شاعری‘‘ ہے، انہوں نے غالب کے کلام کا اودھی میں منظوم ترجمہ بھی کیا تھا اور ’’اندرونم‘‘ کے نام سے ان کا مجموعہ کلام بھی شائع ہوا تھا، مرحوم نیک اور خاموش طبع تھے اس لئے علمی قابلیت کے باوجود زیادہ شہرت نہیں حاصل کرسکے، اﷲ تعالیٰ غریق رحمت کرے، آمین۔ (ضیاء الدین اصلاحی، دسمبر ۲۰۰۰ء)

 

تعلیل احادیث صحیحین: امام ابو حاتم وأبو زرعہ كی آراء كا تنقیدی جائزہ

It is unique and high distinction of the Muslim Ummah that they have saved the teachings of Prophet Muhammad (PBUH). There have been high profile scholars who had dedicated their lives for the investigation of veracity and authenticity of Ḥadīths. They have been sifting the narrators of Ḥadīths through the myriad of resources to endorse or reject the authenticity of Ḥadīths. Amongst these eminent scholars, Imām Abū Ḥātim and Imām Abū Zur'ah, who made great contribution in the field of Elal Ḥadīth. Both criticized Aḥādīth some of which are quoted in Sahih Imām Bukhārī and Sahih Imām Muslim. Both books have always been taken as an authentic source for the veracity of Aḥādīth. However, they have pointed out a few such aspects which are vital for keeping the veracity and authenticity of Aḥādīth. This article is an attempt to study those Aḥādīth as quoted in the two above mentioned books and were criticized by Imām Abū Ḥātim and Abū Zur’ah in their book Elal Ḥadīths, by comprising with sayings of the concerned scholars. The most accurate aspect has been elaborated.

Atmospheric Dispersion and Consequence Modeling of Radiological Emergencies

The Medium Term Development Frame Work (MTDF) 2005-10 by Planning Commission Government of Pakistan states the policy for power sector in which it puts a greater emphasis on nuclear power resources by increasing its share from currently 425 MW to 8800MW by 2030. With the increase of nuclear share in the overall national energy mix, a corresponding environmental impact and nuclear safety analysis are equally important. These are usually taken care of by Primary Safety Analysis Report (PSAR) of a proposed nuclear power plant. The PSAR of any proposed nuclear power plant involves the assessment of a hypothetical accidental release of radionuclides in the atmosphere as set forth by US-NRC and PNRA such as those given as criteria for preparation and evaluation of radiological emergency plans and preparedness (10CFR100, PAK/910). Modeling atmospheric dispersion (both transport and diffusion) is the first step of such assessments. The objective of this work is to determine a more precise modeling methodology that can better predict the radiological consequences in terms of radionuclide concentration and doses compared to Gaussian dispersion approach that is based on assumptions such as uniform turbulence, flat topography and non-variant wind speed with time and space. The research goal was achieved by developing two broad strategies on the basis of Lagrangian approach. The first strategy is an effort to provide a simple answer to the complex problem. This methodology makes use of empirical parameterization of meteorology which serves as input for dispersion calculations by Lagrangian Stochastic Particle Model (LSPM). But the beauty of approach is its capability to capture complex atmospheric phenomenon like wind directional shear. This approach was used to study hypothetical accidental release of radionuclides in nocturnal atmosphere which generates maximum wind directional shear. The results of dispersion in terms of dispersion coefficients were in good comparison with that of experimental findings in the available literature. The resulting ground level concentrations of radio-nuclides and radiological dose contours were also compared with those based on approach analogous to Gaussian Plume Model (GPM). The exercise proved that how misleading results would be if we ignore wind directional shear in stable atmosphere. The second approach is based on a state of the art solution. It involves the coupling of an Eulerian meteorological model (RAMS) with LSPM. The meteorological model is responsible to provide meteorological input to LSPM at each grid point and at each time step. This computational technique was used to simulate a hypothetical accident at a proposed site for Nuclear Power Plant. The meteorological output of the modeling system was compared with observed values. The comparison proved the efficacy and reliance of the approach. This computationally intensive but effective strategy is quite capable of supporting a real time decision making system for tackling nuclear emergency.
Author